Synthesis of 8-(ω-Hydroxyalkyl)-, 8-(ω-Hydroxyalk-1-enyl)-, and 8-(ω-Hydroxyalk-1-ynyl)adenines Using the <i>tert</i>-Butyldimethylsilyloxymethyl Group, a New and Versatile Protecting Group of Adenine
analogues of adenine substituted at C-8 by an omega-hydroxyalkyl, omega-hydroxyalk-1-enyl, or omega-hydroxyalk-1-ynyl chain of various length has been carried out in five or six steps starting from adenine. The analogues were obtained using a new protectinggroup of adenine, the tert-butyldimethylsilyloxymethyl group. 9-tert-Butyldimethylsilyloxymethyl-adenine is more soluble than adenine in organic